iwlwifi: dbg_ini: support HW error trigger

Differentiate between SW and HW error interrupts and support ini HW
error trigger.
Signed-off-by: Shahar S Matityahu <shahar.s.matityahu@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/fw/dbg.h

@@ -458,4 +458,14 @@ static inline void iwl_fw_umac_set_alive_err_table(struct iwl_trans *trans,
 /* This bit is used to differentiate the legacy dump from the ini dump */
 #define INI_DUMP_BIT BIT(31)
 
+static inline void iwl_fw_error_collect(struct iwl_fw_runtime *fwrt)
+{
+	if (fwrt->trans->ini_valid && fwrt->trans->hw_error) {
+		_iwl_fw_dbg_ini_collect(fwrt, IWL_FW_TRIGGER_ID_FW_HW_ERROR);
+		fwrt->trans->hw_error = false;
+	} else {
+		iwl_fw_dbg_collect_desc(fwrt, &iwl_dump_desc_assert, false, 0);
+	}
+}
+
 #endif  /* __iwl_fw_dbg_h__ */

drivers/net/wireless/intel/iwlwifi/iwl-trans.h

@@ -768,6 +768,7 @@ struct iwl_self_init_dram {
  * @umac_error_event_table: addr of umac error table
  * @error_event_table_tlv_status: bitmap that indicates what error table
  *	pointers was recevied via TLV. use enum &iwl_error_event_table_status
+ * @hw_error: equals true if hw error interrupt was received from the FW
  */
 struct iwl_trans {
 	const struct iwl_trans_ops *ops;
@@ -831,6 +832,7 @@ struct iwl_trans {
 	u32 umac_error_event_table;
 	unsigned int error_event_table_tlv_status;
 	wait_queue_head_t fw_halt_waitq;
+	bool hw_error;
 
 	/* pointer to trans specific struct */
 	/*Ensure that this pointer will always be aligned to sizeof pointer */

drivers/net/wireless/intel/iwlwifi/mvm/ops.c

@@ -1291,8 +1291,7 @@ void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
 	 * can't recover this since we're already half suspended.
 	 */
 	if (!mvm->fw_restart && fw_error) {
-		iwl_fw_dbg_collect_desc(&mvm->fwrt, &iwl_dump_desc_assert,
-					false, 0);
+		iwl_fw_error_collect(&mvm->fwrt);
 	} else if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 		struct iwl_mvm_reprobe *reprobe;
 
@@ -1340,8 +1339,8 @@ void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
 			}
 		}
 
-		iwl_fw_dbg_collect_desc(&mvm->fwrt, &iwl_dump_desc_assert,
-					false, 0);
+		iwl_fw_error_collect(&mvm->fwrt);
+
 		if (fw_error && mvm->fw_restart > 0)
 			mvm->fw_restart--;
 		set_bit(IWL_MVM_STATUS_HW_RESTART_REQUESTED, &mvm->status);

drivers/net/wireless/intel/iwlwifi/pcie/rx.c

@@ -2207,6 +2207,7 @@ irqreturn_t iwl_pcie_irq_msix_handler(int irq, void *dev_id)
 			"Hardware error detected. Restarting.\n");
 
 		isr_stats->hw++;
+		trans->hw_error = true;
 		iwl_pcie_irq_handle_error(trans);
 	}